1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index b829916..517589a 100644
--- a/Makefile
+++ b/Makefile
@@ -219,7 +219,7 @@ _CAN_USE_META_MODE?= yes
 .if !defined(_CAN_USE_META_MODE)
 _MAKE+=	MK_META_MODE=no
 .unexport META_MODE
-.elif ${MK_META_MODE} == "yes"
+.elif defined(MK_META_MODE) && ${MK_META_MODE} == "yes"
 .if !exists(/dev/filemon) && !defined(NO_FILEMON) && !make(showconfig)
 # Require filemon be loaded to provide a working incremental build
 .error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded. \